Thermo Scientific Dionex ICS-5000 Operator's Manual page 280

Dionex ICS-5000 Operator's Manual
1. Check the buffer selection.
2. Verify that the electrode is properly immersed in the calibration buffer.
3. Repeat the calibration procedure (see
repeat the calibration at least one more time.
4. If the error recurs after repeating the calibration at least two times, replace
the Ag/AgCl reference electrode (see
ED pH slope calibration failed.
This error occurs when the pH sensing glass membrane of the Ag/AgCl
reference electrode is broken or otherwise affected, causing the calibration
slope to deviate by more than

unit at 25
To troubleshoot:
1. Make sure the calibration temperature is as close as possible to 25
2. Verify that the correct buffer is being used and that the electrode is
properly immersed in the calibration buffer.
3. Repeat the calibration procedure (see
repeat the calibration at least one more time.
4. If the error recurs after repeating the calibration at least two times, replace
the Ag/AgCl reference electrode (see
ED reference electrode disconnected.
To troubleshoot:
Check the cable connection: Verify that the signal cable from the working
electrode is connected to the detector block (see
264
10% from the theoretical slope of 59 mV/pH
±
.
C
Section 9.28.6). If the error recurs,
Section 9.28.5).
Section 9.28.6). If the error recurs,
Section 9.28.5).
Figure 8-4).
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
C.